混杂FRP加固腐蚀钢筋混凝土圆柱基于位移性能的抗震设计  

Displacement-based seismic design of reinforced concrete corroded circular columns strengthened with hybrid FRP

作　　者：邓宗才[1] 李建辉[1] 张永方[1] 

机构地区：[1]北京工业大学城市与重大工程安全减灾省部共建重点实验室,北京100124

出　　处：《北京科技大学学报》2011年第11期1430-1436,共7页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(50978006);北京自然科学基金资助项目(8082002)

摘　　要：采用简化的双线性纤维增强聚合物(FRP)约束混凝土应力-应变曲线模型,对地震荷载作用下的混杂FRP约束完好混凝土圆柱进行了近似的截面延性分析,再从钢筋有效截面面积的减少、钢筋力学性能的降低和钢筋-混凝土黏结界面的弱化三个方面考虑钢筋腐蚀对截面延性的影响,建立了计算混杂FRP加固腐蚀混凝土圆柱潜在塑性铰区延性的简单适用模型,并编写了无需迭代的混杂FRP加固腐蚀混凝土柱基于位移性能的抗震设计程序.A simple bilinear stress-strain model of fiber-reinforced polymer（FRP） confined concrete was used to analyze the approximate cross-sectional ductility of undamaged circular columns strengthened with hybrid FRP under seismic loads.The effect of reinforcement corrosion on the sectional ductility was considered by the loss of rebar cross-sectional area,the reduction of rebar＇s mechanical properties and the degradation of interface bonding between rebar and concrete.Then,a simple analytical model was established to estimate the ductility of potential plastic hinge regions.Finally,a non-iterative displacement-based seismic design program for reinforced concrete corroded columns strengthened with hybrid FRP was presented on the basis of the simple analytical model.

关 键 词：钢筋混凝土 纤维增强聚合物 腐蚀 抗震设计 

分 类 号：TU375.3[建筑科学—结构工程]